CN115126876A - Long-acting temperature control type magnetic fluid sealing device suitable for narrow space - Google Patents
Long-acting temperature control type magnetic fluid sealing device suitable for narrow space Download PDFInfo
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- CN115126876A CN115126876A CN202210836665.0A CN202210836665A CN115126876A CN 115126876 A CN115126876 A CN 115126876A CN 202210836665 A CN202210836665 A CN 202210836665A CN 115126876 A CN115126876 A CN 115126876A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
- F16J15/43—Sealings between relatively-moving surfaces by means of fluid kept in sealing position by magnetic force
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The invention discloses a long-acting temperature control type magnetic fluid sealing device suitable for a narrow space, which comprises: the rotating shaft is connected with the output shaft of the magnetic fluid application end equipment; the shell is sleeved outside the rotating shaft; magnetic fluid filled between the rotating shaft and the casing; the permanent magnet generates a magnetic field to seal the magnetic fluid at the current position; the rotating shaft is provided with a first cavity for containing the phase change material and a second cavity arranged on one side of the first cavity, and a plurality of first heat-conducting blocks and second heat-conducting blocks are arranged in the second cavity; the first heat conduction block and the second heat conduction block form sliding connection; when the phase change material in the first cavity is in a solid phase, the first heat conduction block and the second heat conduction block are overlapped; when the phase-change material in the first cavity is in a liquid phase, the first heat-conducting block and the second heat-conducting block are staggered; the invention realizes the magnetic fluid sealing and reduces the influence of temperature on the magnetic fluid under the condition of keeping the rotating shaft main body, the permanent magnetic steel and the shell.
Description
Technical Field
The invention belongs to the technical field of magnetic fluid sealing, and particularly relates to a long-acting temperature control type magnetic fluid sealing device suitable for a narrow space.
Background
The magnetic fluid sealing technology is developed on the basis of magnetic fluid, and when the magnetic fluid is injected into the gap of a magnetic field, the magnetic fluid can fill the whole gap to form a liquid O-shaped sealing ring. The magnetic fluid sealing device has the function of transmitting rotary motion into a sealed container, and is commonly used for vacuum sealing.
The traditional magnetic fluid sealing element structure comprises: the magnetic conduction axle, not magnetic conduction shell, magnetism isolating gasket (2), fluorine rubber sealing washer (a plurality of), permanent magnet, magnetic pole (2), end cover, retaining ring for the axle, bearing. In some special application occasions, the magnetic fluid interface structure is especially compared with the magnetic fluid interface structure, so that the radial space in the magnetic fluid is compressed, and the application range of the magnetic fluid is limited.
In addition, when the magnetic fluid is used, the temperature of the driving part is increased and transmitted to the magnetic fluid, the magnetic flux density of all magnetic materials is changed along with the increase and decrease of the temperature, the performance of the magnet is reduced by a percentage under the condition that the temperature is increased by one degree per liter, and the heat generated by the work of the driving part directly influences the magnetism of the magnetic fluid, so that the failure of the magnetic fluid sealing device is caused.
Disclosure of Invention
This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.
The invention provides a long-acting temperature control type magnetic fluid sealing device suitable for narrow space in order to overcome the defects of the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme: a long-term accuse warm type magnetic fluid sealing device suitable for narrow and small space includes:
the rotating shaft is connected with the output shaft of the magnetofluid application end device;
the shell is sleeved outside the rotating shaft;
magnetic fluid filled between the rotating shaft and the casing;
the permanent magnet generates a magnetic field to seal the magnetic fluid at the current position;
the rotating shaft is provided with a first cavity for containing the phase change material and a second cavity arranged on one side of the first cavity, and a plurality of first heat-conducting blocks and second heat-conducting blocks are arranged in the second cavity;
the first heat conduction block and the second heat conduction block form sliding connection;
when the phase change material in the first cavity is in a solid phase, the first heat conduction block and the second heat conduction block are overlapped; when the phase-change material in the first cavity is in a liquid phase, the first heat-conducting blocks and the second heat-conducting blocks are staggered.
Furthermore, one end of the rotating shaft is provided with a mounting part, and the diameter of the mounting part is larger than that of the rotating shaft.
Furthermore, a tooth-shaped groove for accommodating the magnetic fluid is arranged on the mounting part.
Furthermore, the mounting part is provided with an annular groove for mounting the permanent magnet.
Further, the permanent magnet is arranged between the tooth-shaped grooves.
Furthermore, a plurality of air inlet cavities are arranged on the side wall of the second cavity.
Furthermore, a connecting pipe is arranged in the first cavity, an air outlet cavity communicated with the second cavity is arranged on the mounting part, and the air outlet cavity is communicated with the connecting pipe.
Furthermore, a plurality of fan blades are arranged on the inner wall of the second cavity.
Furthermore, a third cavity for containing the phase change material is arranged on the second heat conduction block.
Furthermore, a connecting ring is arranged on the second heat-conducting block, and a first connecting cavity used for communicating all the third cavities is arranged on the connecting ring.
The invention has the following advantages: the long-acting temperature control type magnetic fluid sealing device suitable for the narrow space is provided, which realizes magnetic fluid sealing and reduces the influence of temperature on the magnetic fluid under the condition of keeping the rotating shaft main body, the permanent magnetic steel and the shell.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, serve to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and their description illustrate the embodiments of the invention and do not limit it.
Further, throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic and that elements and elements are not necessarily drawn to scale.
In the drawings:
fig. 1 is a schematic structural view of a long-term temperature-controlled type magnetic fluid sealing device suitable for a narrow space according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of the first cavity and the second cavity of the long-acting temperature-control type magnetic fluid sealing device suitable for narrow spaces.
Fig. 3 is an enlarged view of the second cavity of the long-acting temperature-controlled magnetic fluid sealing device suitable for narrow space.
Fig. 4 is a schematic view of the connection pipe of the long-acting temperature-controlled magnetic fluid sealing device suitable for a narrow space.
Fig. 5 is an enlarged view of the connecting pipe of the long-term temperature-controlled type magnetic fluid sealing device suitable for a narrow space.
Fig. 6 is a sectional view of a long-term temperature-controlled type magnetic fluid sealing device suitable for a narrow space according to another embodiment of the present invention.
Fig. 7 is an enlarged view of the first cavity of the long-acting temperature-controlled magnetic fluid sealing device suitable for narrow space.
100. The long-acting temperature control type magnetic fluid sealing device is suitable for narrow spaces; 101. a rotating shaft; 101a, a second cavity; 101b, a first cavity; 101c, an air inlet cavity; 101d, a tooth-shaped groove; 101f, a second connection cavity; 1011. an installation part; 1012. a first heat-conducting block; 1013. a second heat-conducting block; 1013a, a third cavity; 10131. a guide block; 10131a, a material conveying cavity; 10132. a first return spring; 10133. an arc-shaped plate; 1014. pushing the plate; 10141. a support spring; 1015. a fan blade; 1016. a connecting pipe; 102. a housing; 102a, a connecting hole; 102b, a chamber; 1021. an end face; 1022. a fluorine rubber sealing ring; 103. a permanent magnet; 104. epoxy resin glue; 105. a baffle plate; 106. a bearing; 107. a magnetic isolation gasket; 108. a limit retainer ring; 109. an end cap;
200. the long-acting temperature control type magnetic fluid sealing device is suitable for narrow spaces; 201. a connecting ring; 202. connecting blocks; 203. moving the plate; 204. a second return spring.
Detailed Description
Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present disclosure are shown in the drawings, it is to be understood that the disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided for a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and the embodiments of the disclosure are for illustration purposes only and are not intended to limit the scope of the disclosure.
It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings. The embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict.
It should be noted that the terms "first", "second", and the like in the present disclosure are only used for distinguishing different devices, modules or units, and are not used for limiting the order or interdependence relationship of the functions performed by the devices, modules or units.
It is noted that references to "a", "an", and "the" modifications in this disclosure are intended to be illustrative rather than limiting, and that those skilled in the art will recognize that "one or more" may be used unless the context clearly dictates otherwise.
The names of messages or information exchanged between devices in the embodiments of the present disclosure are for illustrative purposes only, and are not intended to limit the scope of the messages or information.
The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
The long-acting temperature-controlled magnetic fluid sealing device 100 suitable for a narrow space, as shown in fig. 1-2, comprises a rotating shaft 101, a housing 102, a permanent magnet 103 and a magnetic fluid.
The rotating shaft 101 is connected with an output shaft of equipment at a magnetofluid application end, the outer shell 102 is sleeved outside the rotating shaft 101, an installation part 1011 is arranged at one end of the rotating shaft 101, the diameter of the installation part 1011 is larger than that of the shaft body of the rotating shaft 101, and a gap between the rotating shaft 101 and the outer shell 102 is reduced to fill magnetofluid; the installation part 1011 is provided with a tooth-shaped groove 101d, the magnetic fluid is filled in the tooth-shaped groove 101d, and the inner wall of the shell 102 and the side wall of the installation part 1011 form a sealed space which is matched with the permanent magnet 103 to seal the magnetic fluid; an annular groove is formed in the mounting portion 1011, the annular groove is formed between the tooth-shaped grooves 101d, the permanent magnet 103 is of an annular structure, and the permanent magnet 103 is mounted in the annular groove; the permanent magnet 103 is a neodymium iron boron permanent magnet, and the magnetic fluid is bound in the tooth-shaped groove 101d by a magnetic field generated by the permanent magnet 103, so that the use reliability of the sealed rotating shaft 101 is ensured.
The rotating shaft 101 and the shell 102 are a revolving body formed around a uniform central axis, the shell 102 is provided with a chamber 102b in an ascending manner, a bearing 106 is arranged in the chamber 102b, the rotating shaft 101 penetrates through the bearing 106, the side wall of the bearing 106 is contacted with the inner wall of the chamber 102b, the inner wall is contacted with the rotating shaft 101, the rotating shaft 101 is provided with a first annular groove, a limiting check ring 108 is arranged in the first annular groove, and the limiting check ring 108 abuts against the side wall of the bearing 106 to fix the bearing 106 and prevent the bearing 106 from moving in the chamber 102 b; the side wall of the bearing 106 is provided with a magnetic isolation gasket 107, the side wall of the magnetic isolation gasket 107 is propped against the inner wall of the cavity 102b, the bearing 106 is assisted and fixed, and the influence of the magnetic fluid and the permanent magnet 103 on the bearing 106 is reduced.
The number of the bearings 106 can be multiple, and the adjustment is performed according to the length of the rotating shaft 101, in this embodiment, for example, two bearings 106 are provided, a washer is provided between the two bearings 106 to separate the two bearings 106, and a magnetic isolation washer 107 and a limit retainer ring 108 are respectively provided on the side walls of the two bearings 106, and cooperate with the washers to fix the bearings 106, so as to prevent the bearings 106 from moving when the rotating shaft 101 rotates.
The friction force between the rotating shaft 101 and the inner wall of the shell 102 is reduced by the arrangement of the bearing 106, and the loss of kinetic energy of equipment at the application end of the magnetic fluid is reduced by matching with the magnetic fluid.
Be equipped with the connecting groove on the one end inner wall of cavity 102b, be equipped with end cover 109 in the connecting groove, end cover 109 seals cavity 102b, avoids bearing 106 to receive the influence when using, guarantees the stability that bearing 106 used.
One end of the shell 102 is provided with a connecting ring, one end of the mounting part 1011 is provided with a second annular groove matched with the connecting ring, and when the shell 102 is sleeved on the rotating shaft 101, the connecting ring is positioned in the second annular groove; the inner wall of the shell 102 is provided with a third ring groove, a baffle 105 is arranged in the third ring groove, the baffle 105 abuts against the inner wall of the second ring groove, the baffle 105 is matched with the tooth-shaped groove 101d to seal the magnetic fluid, and the sealing effect on the magnetic fluid is further improved.
An end face 1021 is arranged on the shell 102, a first groove and a plurality of connecting holes 102a are formed in the end face 1021, a fluorine rubber sealing ring 1022 is arranged in the first groove, screws penetrate through the connecting holes 102a, the magnetic fluid application end device is connected to the shell 102 through the screws, and the connecting position of the shell 102 and the device is sealed through the fluorine rubber sealing ring 1022, so that the sealing effect of the shell 102 and the magnetic fluid application end device is improved.
As shown in fig. 3-5, a first cavity 101b and a second cavity 101a are provided on the mounting portion 1011, the first cavity 101b and the second cavity 101a are both ring-shaped structures, the first cavity 101b is provided outside the second cavity 101a, and the first cavity 101b is filled with a phase-change material; a plurality of air inlet cavities 101c are formed in the side wall of the second cavity 101a, a connecting pipe 1016 is arranged in the first cavity 101b, the connecting pipe 1016 penetrates through the first cavity 101b, an air outlet cavity communicated with the second cavity 101a is formed in the mounting portion 1011, the air outlet cavity is communicated with the connecting pipe 1016 and is formed in one side of the air inlet cavity 101 c; a plurality of fan blades 1015 are disposed on the inner wall of the second cavity 101 a.
The phase-change material has a temperature control effect on the mounting part 1011, so that the temperature of the magnetic fluid is controlled, the temperature on the magnetic fluid and the permanent magnet 103 is absorbed, and the sealing reliability of the magnetic fluid is ensured; when the driving part drives the rotating shaft 101 to rotate, the fan blade 1015 rotates along with the rotating shaft 101, the fan blade 1015 plays a role in drainage, the air flow enters the second cavity 101a from the air inlet cavity 101c, and the air flow entering the second cavity 101a flows out from the air outlet cavity, so that the air flow forms a flow situation, the air flow plays a role in cooling the phase-change material and the magnetic fluid, the cooling effect of the phase-change material on the magnetic fluid is improved, the temperature of the magnetic fluid is controlled within a specified range, and the influence of the temperature on the magnetic fluid sealing device is reduced.
Specifically, a plurality of first heat conduction blocks 1012 and second heat conduction blocks 1013 are arranged in the second cavity 101a, the first heat conduction blocks 1012 are fixedly connected to the inner wall of the second cavity 101a, through grooves are formed on the second heat conduction blocks 1013, and the second heat conduction blocks 1013 are arranged in the through grooves in a penetrating manner; the bottom of second cavity 101a is equipped with first activity groove, second heat conduction piece 1013 bottom is equipped with guide block 10131, first activity groove intercommunication first cavity 101b and second cavity 101a, guide block 10131 wears to locate first activity inslot, guide block 10131 bottom is equipped with arc 10133, arc 10133 area is greater than first activity groove, arc 10133 seals first activity groove, avoids phase change material to enter into in the first cavity 101b from first activity groove.
When the phase change material in the first cavity 101b is in a solid phase, the first heat conduction block 1012 and the second heat conduction block 1013 are overlapped so as to transfer heat on the magnetic fluid to the phase change material, thereby improving the temperature control effect of the phase change material on the magnetic fluid; when the phase change material in the first cavity 101b is in a liquid phase, the first heat-conducting block 1012 and the second heat-conducting block 1013 are staggered, the through groove is opened, the airflow entering the second cavity 101a directly passes through the through groove, the airflow flows out from the air outlet cavity, and a flowing airflow is formed in the second cavity 101a, so that the temperature of the phase change material and the magnetic fluid is better controlled.
More specifically, a third cavity 1013a is arranged on the second heat conduction block 1013, a material conveying cavity 10131a communicated with the third cavity 1013a is arranged on the guide block 10131, and a second groove communicated with the material conveying cavity 10131a is arranged at the bottom of the arc 10133; a first return spring 10132 is arranged on the side wall of the guide block 10131; a plurality of second movable grooves are formed in the inner wall of the second cavity 101a, the second movable grooves are formed below the first heat-conducting block 1012, a supporting spring 10141 is arranged at the bottom of each second movable groove, a push plate 1014 is arranged on each supporting spring 10141, the length of each push plate 1014 corresponds to that of the second cavity 101a, a guide plate is connected to the side wall of each push plate 1014 in a crossed mode, the other end of each guide plate is hinged to the inner wall of the second cavity 101a, and each guide plate is a telescopic plate; be equipped with the second connection chamber 101f that is used for communicating first activity groove and second activity groove on the installation department 1011, push pedal 1014 bottom is equipped with the connection rope, connects rope one end and links firmly on guide block 10131 lateral wall.
When the rotating shaft 101 rotates under the action of the driving part, the phase-change material moves towards the third cavity 1013a under the action of centrifugal force, the phase-change material is filled in the third cavity 1013a to shorten the distance between the phase-change material and the magnetic fluid, and the temperature control effect of the phase-change material on the magnetic fluid is improved; when the phase change material is in a solid phase, the phase change material fills the whole second cavity 101a, the phase change material pushes the push plate 1014 to enter the second movable groove, and the second heat conduction block 1013 is inserted in the through groove to conduct the heat on the magnetic fluid to the phase change material, so that the phase change material absorbs heat better; when the phase change material is in a liquid phase state, the volume of the phase change material is reduced, meanwhile, the phase change material moves away from the push plate 1014 under the action of centrifugal force, the push plate 1014 is not extruded, the supporting spring 10141 pushes the push plate 1014 to move towards the outside of the second movable groove, the connecting rope pulls the guide block 10131 to move towards one end of the first movable groove, the guide block 10131 drives the second heat conduction block 1013 to move, the second heat conduction block 1013 moves out of the through groove, the through groove is opened to communicate the air inlet cavity 101c with the air outlet cavity, at the moment, the phase change material is still filled in the third cavity 1013a, and the air flow passes through the side wall of the second heat conduction block 1013, the phase-change material in the second heat-conducting block 1013 is cooled, so that the phase-change material can continuously absorb heat on the magnetic fluid, the air flow is matched with the phase-change material, part of the heat in the first cavity 101b is directly taken away, the temperature of the phase-change material is controlled within a specified range, and a stable working environment is provided for the magnetic fluid.
The inner wall of the through groove is provided with a limiting block, and the limiting block limits the maximum moving distance of the second heat-conducting block 1013, so that the second heat-conducting block 1013 is prevented from moving out from the other side of the through groove.
The second heat-conducting block 1013 is inserted into the through groove and the second half is located in the first cavity 101b, so that the phase-change material in the third cavity 1013a has sufficient heat-dissipating space, thereby ensuring the temperature control effect of the phase-change material on the magnetic fluid.
As shown in fig. 6-7, as a further preferable scheme of the long-acting temperature-controlled magnetic fluid sealing device 200 suitable for narrow spaces, all the second heat-conducting blocks are connected through a connecting ring 201, a first connecting cavity is arranged on the first connecting ring 201, and the first connecting cavity is communicated with a third cavity; when the rotating shaft rotates, the phase-change materials in different third cavities enter the first connecting cavity to be crossed, so that the phase-change materials in the third cavities are in a flowing state, the phase-change materials are uniformly heated, and the temperature control effect of the phase-change materials on the magnetic fluid is further improved.
A connecting block 202 is arranged on the side wall of the guide block, a movable cavity is arranged on the connecting block 202, a moving plate 203 is arranged in the movable cavity, a second reset spring 204 is arranged on the moving plate 203, one end of a connecting rope is fixedly connected to the moving plate 203, and the other end of the connecting rope is fixedly connected to the bottom of the pushing plate; after the phase-change material in the second cavity absorbs heat, part of the push plates in the second movable groove rise under the action of the supporting spring, the part of the rising push plates pull the movable plate 203 to move in the movable cavity, and after all the push plates rise, the connecting rope pulls the guide block to move in the first movable groove, so that the second heat-conducting block is pulled out from the through groove, the first cavity is kept in an unblocked state, and the magnetic fluid and the phase-change material are cooled in an auxiliary manner by utilizing air flow.
The foregoing description is only exemplary of the preferred embodiments of the disclosure and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the invention in the embodiments of the present disclosure is not limited to the specific combination of the above-mentioned features, but also encompasses other embodiments in which any combination of the above-mentioned features or their equivalents is made without departing from the inventive concept as defined above. For example, the above features and (but not limited to) technical features with similar functions disclosed in the embodiments of the present disclosure are mutually replaced to form the technical solution.
Claims (10)
1. A long-term accuse warm type magnetic fluid sealing device suitable for narrow and small space includes:
the rotating shaft is connected with the output shaft of the magnetofluid application end device;
the shell is sleeved outside the rotating shaft;
a magnetic fluid filled between the rotating shaft and the housing;
the permanent magnet generates a magnetic field to seal the magnetic fluid at the current position;
the method is characterized in that:
the rotating shaft is provided with a first cavity for containing a phase change material and a second cavity arranged on one side of the first cavity, and a plurality of first heat-conducting blocks and second heat-conducting blocks are arranged in the second cavity;
the first heat conduction block and the second heat conduction block form sliding connection;
when the phase-change material in the first cavity is in a solid phase, the first heat-conducting block and the second heat-conducting block are coincided; when the phase-change material in the first cavity is in a liquid phase, the first heat-conducting block and the second heat-conducting block are staggered.
2. The long-acting temperature-control type magnetic fluid sealing device applicable to the narrow space according to claim 1, which is characterized in that: rotation axis one end is equipped with the installation department, the installation department diameter is greater than the rotation axis diameter.
3. The long-acting temperature-control type magnetic fluid sealing device suitable for the narrow space according to claim 2, characterized in that: and the mounting part is provided with a tooth-shaped groove for accommodating the magnetic fluid.
4. The long-acting temperature-control type magnetic fluid sealing device suitable for the narrow space according to claim 2, is characterized in that: and the mounting part is provided with an annular groove for mounting the permanent magnet.
5. The long-acting temperature-control type magnetic fluid sealing device suitable for the narrow space according to claim 3, is characterized in that: the permanent magnet is arranged between the tooth-shaped grooves.
6. The long-acting temperature-control type magnetic fluid sealing device applicable to the narrow space according to claim 1, which is characterized in that: and a plurality of air inlet cavities are arranged on the side wall of the second cavity.
7. The long-acting temperature-control type magnetic fluid sealing device suitable for the narrow space according to claim 2, is characterized in that: the connecting pipe is arranged in the first cavity, the air outlet cavity communicated with the second cavity is arranged on the mounting part, and the air outlet cavity is communicated with the connecting pipe.
8. The long-acting temperature-control type magnetic fluid sealing device applicable to the narrow space according to claim 1, which is characterized in that: and a plurality of fan blades are arranged on the inner wall of the second cavity.
9. The long-acting temperature-control type magnetic fluid sealing device applicable to the narrow space according to claim 1, which is characterized in that: and a third cavity for containing the phase change material is arranged on the second heat conduction block.
10. The long-acting temperature-controlled magnetic fluid sealing device applicable to narrow spaces according to claim 9, wherein: and a connecting ring is arranged on the second heat-conducting block, and a first connecting cavity for communicating all the third cavities is arranged on the connecting ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210836665.0A CN115126876A (en) | 2022-07-15 | 2022-07-15 | Long-acting temperature control type magnetic fluid sealing device suitable for narrow space |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210836665.0A CN115126876A (en) | 2022-07-15 | 2022-07-15 | Long-acting temperature control type magnetic fluid sealing device suitable for narrow space |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115126876A true CN115126876A (en) | 2022-09-30 |
Family
ID=83383355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210836665.0A Withdrawn CN115126876A (en) | 2022-07-15 | 2022-07-15 | Long-acting temperature control type magnetic fluid sealing device suitable for narrow space |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115126876A (en) |
-
2022
- 2022-07-15 CN CN202210836665.0A patent/CN115126876A/en not_active Withdrawn
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Application publication date: 20220930 |
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